Bump to 2.3.1

Also fix hex packaging
diff --git a/README.md b/README.md
index d0d82c9..9cadd17 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@
 
 *2.x*
 
-- 2.3.1 (Current master)
+- 2.3.1
   - Updated `app_deps` script to run with rebar3 dependencies
   - Minor docs update
 - 2.3.0
diff --git a/src/recon.app.src b/src/recon.app.src
index 4d16a18..ba65e0c 100644
--- a/src/recon.app.src
+++ b/src/recon.app.src
@@ -1,6 +1,13 @@
 {application, recon,
  [{description, "Diagnostic tools for production use"},
-  {vsn, "2.3.0"},
+  {vsn, "2.3.1"},
   {modules, [recon, recon_alloc, recon_lib, recon_trace]},
   {registered, []},
-  {applications, [kernel, stdlib]}]}.
+  {applications, [kernel, stdlib]},
+
+  {maintainers, ["Fred Hebert"]},
+  {licenses, ["BSD"]},
+  {links, [{"Github", "https://github.com/ferd/recon/"},
+           {"Documentation", "http://ferd.github.io/recon/"}]},
+  {files, ["src/", "script/", "rebar.lock", "README.md", "LICENSE"]}
+]}.